Looking to see if I could pick someone's head on this, have put in Crow valve springs, and just setting up atomic timing kit. Iv come to do timing, cylinder one is at tdc cams are 12 o clock and all timing marks line up perfectly, after fitting it all and trying to turn over by hand turns slightly but then seems very hard, and won't turn, would this be down to stronger springs? Don't want to push it to hard. Tia 😁